Determining the Percent Copper and Zinc in Pennies from Density Lab Report Procedure: For pre-1982 pennies- Mass 10 pennies‚ record data. Fill a 100mL graduated cylinder to 40mL or enough to fully submerge the pennies with water‚ record the volume in data table. Carefully place the pennies into the graduated cylinder‚ record the final volume of the water in data table. To find the volume of the pennies‚ subtract the final volume from the initial‚ record the data. Repeat this procedure twice more
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the data from before created a graph. Using the graph‚ get the best-fit straight line to examine the relationship. Using the predicative model (the best-fit line) to determine the percent copper and zinc in pennies. Then accuracy the errors and error percentages. Precision the absolute deviation and the deviation percentages. Observation: Part 1: Pre-82 Pennies Weight 10 dry pre-82 pennies which get 30.29g‚ using 30ml initial volume measuring the volume of 10 pennies‚ record the data 3.0ml
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Detailed Lesson Plan in Mathematics IV I.Objectives At the end of the lesson‚ the students should be able to: 1. Identify linear equation in two variables. 2. Solve and graph linear equation in two linear variables 3..Present solutions with accuracy and precision in ones work. II.Subject matt... Premium763 Words4 Pages Detailed Lesson Plan A DETAILED DEMOSTRATION LESSON PLAN IN SCIENCE AND HEALTH V I. OBJECTIVES At the end of the lesson‚ the pupils should be able to: a. Identify ways by which solar
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EXPERIMENT #1: SCIENTIFIC MEASUREMENT AND ERROR By: Date: 8/26/13 Objectives: The goals of the experiment are to learn how to use different types of scientific glassware and to understand the significance of precision and accuracy in scientific measurement. Procedure: No modifications were made during the experiment. Data: Data tables for the experiment are provided on attached sheet. Calculations: Table I - Table III – Table IV –
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discrepancies in the weight of different graduated cylinders. 4. a) In Part B‚ you are instructed to deliver “about 2 mL” of water from a buret “with a precision of 0.01 mL.” Which of the following quoted volumes is/are consistent with these instructions? 1.87 mL it follows instructions for precision‚ but not necessarily for accuracy 1.999 mL this does not use the number of significant digits we are supposed to use (3 sd would be 1.99 mL) 2.03 mL it
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household chemicals together. Accuracy is the magnitude in which a certain measurement agrees with the standard worth for that measurement (Dictionary‚ 2011). Precision is how close the measured standards are to each other (Math is fun‚ 2011). Society depends on accuracy and precision in everyday life. These two relationships are often substituted freely‚ but both have crucial differences. Businesses entail both accurate and precise measurements to stay in business. Accuracy states that something is
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lives even though we may not realize that chemistry is everywhere. This paper serves to examine the ways in which chemistry is relevant in everyday life and in society. It will also examine the difference between accuracy and precision and provide examples of when accuracy and precision are crucial in measurements and why society depends on these measurements to be accurate and precise ( Tam 2012). Chemistry in Society When we turn on the tap and fill a glass with water and drink it‚ we are benefitting
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6429 Ω (from the graph) ΔS = |S1 - S2| / 2 = | (-0.4714 - (-0.6429)) | / 2 = 0.08580 Ω (cor. to 4 sig. fig) _THE INTERNAL RESISTANCE OF THE BATTERY ± Δ INTERNAL RESISTANCE OF THE BATTERY = 0.5223 Ω ± 0.08580 Ω_ (COR. TO 4 SIG. FIG) Percentage precision = (1.000 - 0.08580 /0.5223) x 100% = 83.57% (cor. to 4 sig. fig) _THE EMF OF THE BATTERY_ Uncertainty for intercept vertical axis From the graph above (Voltage against Current) Intercept vertical axis of the best-fit line = 1.2969 V (from the
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Experiment 2 CALIBRATION OF A PIPETTE Introduction An ordinary laboratory pipette may be expected to deliver its nominal volume with good precision and good accuracy if it is used in the way recommended. In this experiment we investigate the precision and accuracy of such a pipette by making accurate determinations of the mass of water it delivers in repeated operations. Materials 10.0-cm3 pipette‚ 50-cm3 beaker‚ thermometer‚ pipette filler‚ graph paper. Procedure
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But she’s adopted S- *goes to the corner and cries* *Dart Scene* C- y’all ready for a family game night? SA- I suppose it will help release tension‚ Heather you’re up for it C- It will help you with your precision and accuracy because you suck so bad (Explains precision and accuracy) *heather throws all three darts and misses* SA- Well you’re accurate at sucking but at least you’re precise
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